HD 187474 - The first results of surface magnetic field measurements

Details HD 187474 - The first results of surface magnetic field measurements HD 187474 - The first results of surface magnetic field measurements

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987msngr..49....5d&link_type=abstract

ESO Messenger (ISSN 0722-6691), Sept. 1987, p. 5-10.

Computer Science

11

Peculiar Stars, Stellar Magnetic Fields, Stellar Spectra, Surface Properties, Fourier Analysis, Line Spectra, Magnetic Field Configurations, Metallicity

Scientific paper

During two observations by the CAT instrument in December 1985 and October 1986, ceveral magnetic chemically peculiar stars (CP stars, described by Preston, 1974) were observed at several different wavelengths. This paper presents the first results of surface magnetic field (Hs) measurements on the very slow rotating (rotational period equal to about 7 years) CP star HD 187474 of the Si-Cr-Eu type. The preliminary study of resolved Zeeman pattern allowed the determination of the Hs strength and its mean inclination on the line of sight at the time of observation. The comparison of observed and calculated Zeeman broadening functions shows that the Robinson (1980) method is suitable for measuring Hs.

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